docs: def get_additional_services(settings_module):
      """
          if HENDRIX_SERVICES is specified in settings_module,
          it should be a list twisted internet services
  
          example:
  
              HENDRIX_SERVICES = (
                ('myServiceName', 'apps.offload.services.TimeService'),
              )
      """
  
      additional_services = []
  
      if hasattr(settings_module, 'HENDRIX_SERVICES'):
          for name, module_path in settings_module.HENDRIX_SERVICES:
              path_to_module, service_name = module_path.rsplit('.', 1)
              resource_module = importlib.import_module(path_to_module)
              additional_services.append(
                  (name, getattr(resource_module, service_name))
              )
      return additional_services